Processing an image to sepia tone in Python

Question

I need help figuring out how to convert an image to sepia. This is what I have so far..but it only changes everything to black and white colors with a very small tint of bro

Answer 1

Your gray level image is not a gray level image. In a gray level image all three channels r,g,b have the same value.

Open paint and try it to verify if your code makes sense.

Fix these lines:

newR = (R * 0.393 + G * 0.769 + B * 0.189)
newG = (R * 0.349 + G * 0.686 + B * 0.168)
newB = (R * 0.272 + G * 0.534 + B * 0.131)

Simply use the mean of r,g,b and put it into newR, newG and newG.

There are some weighted means as well. Just Google for RGB to intensity formulas.